Open AccessA novel sufficient condition to avoid subharmonic oscillations for buck converters with constant on‐time control
Author(s) -
Bizzarri F.,
Nora P.,
Brambilla A.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.3082
Subject(s) - subharmonic , control theory (sociology) , converters , constant (computer programming) , buck converter , time constant , control (management) , mathematics , physics , computer science , engineering , nonlinear system , power (physics) , electrical engineering , quantum mechanics , artificial intelligence , programming language
Fast transient response, simple control scheme and low cost are features that distinguish constant‐on‐time buck converters from others. Simplicity of the control scheme is reflected in a single requirement for power electronics engineers: a design that ensures enough low amplitude resistive ripple component at the feedback to precisely starts the on‐time pulse. There are design rules that guide the selection of the components. A well known one reported in the literature predicts if the converter suffers of the sub‐harmonic oscillations undesirable phenomenon. The authors present a better simple design expression to avoid the onset of this unwanted drawback.